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Finding the Fourth Proportional to 279,894.68, 386,240.08 and 159,019.18

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Solution

The fourth proportional to 279,894.68, 386,240.08 and 159,019.18 is: 219,438.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,894.68 : 386,240.08 = 159,019.18 : x
  2. Step 2: Convert to fraction form
    279,894.68/386,240.08 = 159,019.18/x
  3. Step 3: Cross multiply
    279,894.68x = 386,240.08 × 159,019.18
  4. Step 4: Simplify right side
    279,894.68x = 61,419,580,804.73
  5. Step 5: Solve for x
    x = 61,419,580,804.73/279,894.68
  6. Step 6: Final answer
    x = 219,438.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.